If you are in Bismarck in your RV and need laundry service, I would try to go before noon. I parked the RV in the movie theater parking lot next door. Not sure if that was allowed, but since the movies didn’t open until noon, no one was in the parking lot. There is no room to park the RV at the laundromat. Laundromat was crowded, however, I managed to get a few machines. When I was there in summer of 2012, it was $ 1.25 to wash and $ 1 to dry.